Disk Plow., patent, November 4, 1919; (https://texashistory.unt.edu/ark:/67531/metapth1256382/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Disk Plow., patent, November 4, 1919; (https://texashistory.unt.edu/ark:/67531/metapth1256382/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .